Re: [PATCH] drm/i915/mtl: Add support of Tile4 to MTL

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Hi Stan,

On 19.12.2022 15.50, Stanislav Lisovskiy wrote:
We have some Tile4 tests now skipping, which were
supposed to be working. So lets make them work, by
adding display_ver 14 as supported.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
---
  drivers/gpu/drm/i915/display/intel_fb.c | 8 ++++----
  1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
index 63137ae5ab217..75a17f38def53 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.c
+++ b/drivers/gpu/drm/i915/display/intel_fb.c
@@ -158,11 +158,11 @@ struct intel_modifier_desc {
  static const struct intel_modifier_desc intel_modifiers[] = {
  	{
  		.modifier = I915_FORMAT_MOD_4_TILED_DG2_MC_CCS,
-		.display_ver = { 13, 13 },
+		.display_ver = { 13, 14 },

I don't think you'd want to do this. These DG2 ccs modifiers rely on usage of flat ccs which is not present in Meteorlake.

  		.plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_MC,
  	}, {
  		.modifier = I915_FORMAT_MOD_4_TILED_DG2_RC_CCS_CC,
-		.display_ver = { 13, 13 },
+		.display_ver = { 13, 14 },

Let's drop this change too.

  		.plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_RC_CC,
.ccs.cc_planes = BIT(1),
@@ -170,11 +170,11 @@ static const struct intel_modifier_desc intel_modifiers[] = {
  		FORMAT_OVERRIDE(gen12_flat_ccs_cc_formats),
  	}, {
  		.modifier = I915_FORMAT_MOD_4_TILED_DG2_RC_CCS,
-		.display_ver = { 13, 13 },
+		.display_ver = { 13, 14 },

And this.

  		.plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_CCS_RC,
  	}, {
  		.modifier = I915_FORMAT_MOD_4_TILED,
-		.display_ver = { 13, 13 },
+		.display_ver = { 13, 14 },

Here you could do something like ".display_ver = { 13, -1 }," to enable tile4 from version 13 onward and we'll fix it if it ever change in the future.

/Juha-Pekka

  		.plane_caps = INTEL_PLANE_CAP_TILING_4,
  	}, {
  		.modifier = I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS,




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